Mustapha C.E. Yagoub

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• PhD
• Professor (Full) at University of Ottawa

The design of a fully integrated adaptive modified complementary metal-oxide-semiconductor (CMOS) synapse circuit is presented. By using multiple-gated transistor configuration in the modified CMOS synapse an additional branch provide control where the synaptic output current time-constant is tuned. The effect of changing the multiple-gated transis...

Phase shifters are essential components of phased array systems, which are crucial to radar and wireless communication systems. New-generation telecommunication and radar systems often require strict phase shifter performance metrics, such as phase resolution and bandwidth, to perform fine beam scanning, which helps increase pointing accuracy. Mean...

This paper presents PCB design solutions for implementing a radiative-field RF energy harvester with an ASK-PWM decoding communication scheme using available commercial components. The paper provides the design approach and tackles key challenges such as the impact of inductive parasitic effects at the output of the harvester, how to maintain the P...

This letter presents the design and implementation of a novel analog phase shifter architecture based on generating and synthesizing non‐quadrature vector signals. The phase shift is achieved through coarse and fine‐tuning. The coarse tuning is executed by the path selectors of the generated phase vectors, whereas tunable passive attenuators do the...

Modern electronics has been shifting these two last decades significantly towards organic materials based on their specific electroactivity, a small molecules Pentacene (C14H22) is widely used as p-type semiconductor channel in thin-film transistors (TFTs) and has high mobility. In this study, a 2-dimensional modelling under Silvaco Software is ado...

Usually, there are some discrepancies between simulations and measurements in Perovskite solar cells (PSCs). This is partially due to ignoring defects in transporting layers. In this work, realistic simulations were undertaken to study the effects of bulk defects in cuprous oxide (Cu2O), the Hole Transporting Layer (HTL). Firstly, two different cel...

Amidst growing global concerns over climate change and escalating greenhouse gas emissions from fossil fuels, the pursuit of renewable energy sources has become critical. This study focuses on harnessing hydropower using Savonius turbines, which are known for their efficiency in generating energy at lower flow rates. However, the intrinsic low effi...

In the rapidly advancing field of 5G technology, efficient thermal management is essential for enhancing the performance and reliability of high-power-density integrated circuits (ICs). This paper introduces an innovative approach to cooling these critical components, significantly surpassing traditional methods. Our design optimizes heatsink and f...

Phased Array Systems (PASs) are extensively used in radar and telecommunication systems for diverse applications, including military surveillance and wireless broadband communication. Besides, they are becoming increasingly indispensable in modern applications such as multi‐function phased array radars for weather monitoring and aircraft tracking o...

The escalating global demand for sustainable energy necessitates the maximization of hydrocarbon recovery, with coalbed methane (CBM) representing a crucial yet underutilized resource. However, the low permeability of coal seams and the persistent risk of methane gas explosions present formidable challenges to effective CBM extraction. Traditional...

The ever-increasing demand for higher and higher 5G wireless communication system performance has a direct impact on the design of highly efficient RF blocks, in which mixers play a key role. In fact, with the exponentially grow of data traffic and the need for high data-rate and low latency, mixers should maintain a high performance while working...

In this paper, a control algorithm based on the Lyapunov stability theory and neural network adaptive scheme is proposed to efficiently regulate the position, attitude, and altitude of a quadrotor through a nonlinear dynamic model. Based on the Lyapunov stability theory, the controller allows the system to continue its task correctly even if one or t...

We present an automatic signal modulation classification model using combinatorial deep learning technique. Our proposed deep learning model increase accuracy for low Signal-to-Noise Ratio (SNR) and maintain a high classification accuracy for high SNR signals. Using a hybrid deep learning model combining both ConvLSTM with Transformer-block neural...

In this paper, a novel millimeter-wave microstrip antenna array is presented. Designed to improve the communication link of an Unmanned Aerial Vehicle in terms of streaming video applications, the proposed 2×4 compact array has a size of 21.89 mm x 10.63 mm. Operating in the band 52–62 GHz with a return loss of -31.59 dB, a maximum gain of 14.3 dBi...

In this work, a 23-25 GHz 3D Frequency Selective Surface (FSS) patch antenna dedicated to 5G applications was designed for gain enhancement purpose by incorporating a 4 × 5 unit cell FSS network. The overall dimensions of the resulting antenna are (40 × 40 × 34) mm 3 . A comparative analysis was conducted to evaluate its performance at various dist...

In this paper, an efficient method is proposed for the position and altitude tracking control of a quadrotor UAV through a nonlinear dynamic model in case of failure of one or two quadrotor rotors and in the presence of parametric uncertainties. In fact, the system continues its tasks correctly even if one or two rotors of the quadrotor stop workin...

A control algorithm is proposed to efficiently control the state, position, and height of a nonlinear dynamic model of a quadcopter. Based on feedback linearization, a state space model is presented for the system with the controller with a two-loop control structure designed and implemented in it. The inner and faster controller is responsible for...

This article reports a novel technique based on drain–bulk capacitor modulation to improve the performance design of a class-F power amplifier (PA) used in low-power transceivers based on the I-Q amplitude modulation technique considering linearity–efficiency–miniaturization trade-offs. This idea is carried out by implementing a tuned capacitor in...

This article proposes a new extraction technique to determine the GaN HEMT extrinsic capacitances over a wide frequency band on two different substrates, namely, the silicon and the silicon carbide. The proposed technique, which uses a small‐signal model equivalent circuit under cold pinch‐off operating conditions, is based on the proposal of a new...

Mobile edge computing (MEC) has recently been introduced as a key technology, emerging in response to the increased focus on new heterogeneous computing applications, resource-constrained mobile devices, and the long delay of traditional cloud data centers. Despite considerable research attention to understanding how the heterogeneous latency-criti...

In this work, the effect of some Frequency Selective Surface (FSS) metasurfaces namely, partially reflecting surface structures is analyzed on the radiation pattern of a monopole antenna etched on anisotropic substrates. Several permittivity values were used in different directions depending on the considered anisotropy ratio. Good improvements in...

This paper proposed a full-wave numerical modal integral method to evaluate the characteristic impedance of symmetrical/asymmetrical finline-type structures. For this purpose, the Galerkin's procedure was applied while using the formalism concept of mathematical operators. To successfully evaluate the accuracy of the numerical results obtained thro...

Background 1% of people around the world are suffering from epilepsy. It is, therefore crucial to propose an efficient automated seizure prediction tool implemented in a portable device that uses the electroencephalogram (EEG) signal to enhance epileptic patients’ life quality. Methods In this study, we focused on time-domain features to achieve d...

This paper proposes new analytical expressions to efficiently determine the cutoff-frequency values, especially of fundamental mode, for homogeneous electric/magnetic anisotropic rectangular waveguides (RWGs) with arbitrary transverse dimensions. To demonstrate the proposed approach, the numerical method of moments was used, involving the formalism...

This paper introduces novel expressions to analytically determine the phase constant of EM fields in an homogeneous uniaxial electric and magnetic anisotropic rectangular waveguide (RWG) with arbitrary transverse dimensions, while focusing on the fundamental mode. To successfully evaluate the reliability of the proposed analytical results, the nume...

Efficient Design of a Single-Balanced Diode Mixer for 5G Communication Systems. Design steps and performances.

In this work, an efficient k-band diode mixer was designed in TSMC CMOS 180 nm technology. It works in the frequency range of 17-28 GHz with a conversion loss of 7.5 dB for an IF frequency of 3 GHz and a local oscillator power of 15 dBm. It exhibits an isolation better than 30 dB between the input LO and RF ports and the IF output port. Furthermore...

This work discusses the design of a broadband single-balanced down converter mixer, operating in the 5G NR FR2 bands of 24.25-29.5 GHz. With an IF frequency of 250 MHz, the mixer presents excellent port-to-port isolation over almost all the targeted band, i.e., 94.6 dB, 72.6 dB, and 25 dB for LO-IF, RF-IF, and RF-LO ports, respectively. It also exh...

In this letter, a highly accurate surrogate model of substrate integrated waveguide (SIW) is proposed. This model allows designers to design SIW structures more efficiently compared to existing complex and CPU‐intensive fine approaches. Based on the multivariate linear regression technique, an accurate equation linking the physical parameters of th...

The brain shows a topographical hierarchy along the lines of lower- and higher-order networks. The exact temporal dynamics characterization of this lower-higher-order topography at rest and its impact on task states remains unclear, though. Using 2 functional magnetic resonance imaging data sets, we investigate lower- and higher-order networks in t...

Emerging 5G cellular networks are expected to face a dramatic increase in the volume of mobile traffic and IoT user requests due to the massive growth in mobile devices and the emergence of new compute-intensive applications. Running high-intensive compute applications on resource-constrained mobile devices has recently become a major concern, give...

We process and integrate multiple timescales into one meaningful whole. Recent evidence suggests that the brain displays a complex multiscale temporal organization. Different regions exhibit different timescales as described by the concept of intrinsic neural timescales (INT); however, their function and neural mechanisms remains unclear. We review...

In this letter, a new extraction technique is proposed to determine the GaN high-electron-mobility transistor (HEMT) extrinsic capacitances using a small-signal model equivalent circuit with 21 elements under cold pinchoff operating conditions. This technique is based on an analytical representation of the various capacitances. The proposed approac...

p>Designing and manufacturing a suitable body is one of the most effective factors in increasing the efficiency of autonomous underwater vehicles (AUVs). In fact, increasing the propulsive power of an AUV by reducing the frictional drag on its body and incre asing its maneuverability will positively affect key parts of the AUV’s hardware and softwa...

This paper introduces, for the first time, an extended modal integral technique for reliable characterization of multilayered symmetrical/asymmetrical planar structures built on arbitrary number of uniaxial electric/magnetic anisotropic layers. Based on a simple but efficient recursive algorithm devoted to composite substrates, the proposed hybrid...

The aim of this work is to design Photonic Band Gap (PBG) structures for the purpose of directional antennas by illuminating these materials with a plane wave and deduced the reflection and transmission coefficients. We have also studied the electromagnetic (EM) properties of periodic structures as well as the distribution of the electric field in...

This paper presents an FSS filter design dedicated to 5G applications around 3.5 GHz, the 5G band for the four French telephone operators. This filter, which consists of 8 × 8 unit slot cells, provides a stable frequency response with regard to the incidence angle. This was achieved by using metallic vias that allowed an insensitivity of the filter...

Magnetic field is one of the most used sciences in today's industry, which is applied in many cases such as electromagnets, electric motors, and generators, electric transformers, electromagnetic wave propagation in antennas, magnetic levitation, etc. that has led to many types of research in this field. Therefore, correct calculation of magnetic f...

Background Because about 30% of epileptic patients suffer from refractory epilepsy, an efficient automatic seizure prediction tool is in great demand to improve their life quality. Methods In this work, time-domain discriminating preictal and interictal features were efficiently extracted from the intracranial electroencephalogram of twelve patien...

Abstract In this paper, a millimeter-wave printed quadrupole antenna is proposed. It consists of two symmetric printed dipoles that make the quadrupole radiating power omnidirectionally. Such an arrangement eliminates the influence of the ground as reflector. Simulation results show that the quadrupole antenna exhibits a broad impedance bandwidth a...

In this paper, a novel substrate integrated waveguide power divider is proposed to feed antenna array elements in series. This feed network inherently provides uniform output power to eight quadrupole antennas. More importantly, it leads to a compact configuration since the feed network can be integrated inside the elements without increasing the a...

In this work, an enhanced 3D frequency selective surface (FSS) patch antenna is proposed for 5G applications. A 23 to 26 GHz patch antenna was first designed before improving its performance by adding a 3 × 5 unit cell two‐layer 2D transmission FSS structure. Then, reflective walls were placed on the side edges of the obtained structure in order to...

This paper proposes a substrate integrated waveguide (SIW) filtering slot antenna. Based on four SIW cavity resonators and a slot locating on the last resonator, a filtering antenna was designed, targeting the near 20 GHz satellite communication band. Simulated in the Ansys-HFSS commercial software, it exhibits a - 10 dB impedance bandwidth of 1.5...

A broadband and high-gain printed antenna array is presented in this paper. Its single antenna element consists of a loop and two symmetric dipole patches, making the element exhibiting broad impedance bandwidth and improved gain at the targeted frequency, which is 28 GHz, one of the 5G mm-wave band, for this design. An 8×3 antenna array fed by a m...

In this work, a numerical quasi-static approach is proposed to efficiently analyze symmetrical shielded broadside-coupled microstrip line (SBCML) structures. Based on the modified least squares boundary residual method combined with a variational technique, this approach allows accurate computation of the electrical/geometrical parameters of differ...

This paper presents a set of statistical channel models based on 60 GHz radio measurements in a server room. The channel models are developed for possible use-cases, corresponding to potential deployment scenarios in wireless data centers (WDCs). A simple parametric channel model is used to model both the deterministic and stochastic channel parame...

Time- and frequency-domain studies of EEG signals are most commonly employed to study the electrical activities of the brain in order to diagnose potential neurological disorders. In this work, we applied the global coherence approach to help estimating the neural synchrony across multiple nodes in the brain, prior and during a seizure. The ratio o...

In this article, a new extraction technique is proposed to extract the small‐signal parameters of gallium nitride (GaN) high electron mobility transistors (HEMTs) on three different substrates namely, Si, SiC, and Diamond. This extraction technique used a single small‐signal circuit model to efficiently describe the physical and electrical properti...

This paper deals with the design of a 60 GHz microstrip patch antenna using transmitarray structures. The influence on the gain and bandwidth was investigated in terms of size and shape. Simulated results showed that the antenna performance can be significantly improved by using rectangular slots instead of circular slots.

This paper deals with the design of a 60 GHz microstrip patch antenna using transmitarray structures. The influence on the gain and bandwidth was investigated in terms of size and shape. Simulated results showed that the antenna performance can be significantly improved by using rectangular slots instead of circular slots.

In this letter, we propose a new and efficient physical layer collision recovery method which exploits the statistical properties of RFID tag signals in terms of the second and fourthorder cumulants. This method is able to recover more than two collided tags even with a single receive antenna at the reader and without requiring any modification in...

Using the sub-harmonic injection locking technique, an enhanced differential Digitally Controlled Ring Oscillator (DCRO) with improved phase noise performance is proposed in this paper. All circuit blocks were implemented using digital design flow and designed using a hardware description language. A Frequency Locked Loop-based Process, Voltage and...

This paper investigates the feasibility of 60 GHz wireless links in wireless data centers (WDC) based on IEEE 802.11ad standard. The achievable data rates are evaluated using WDC measured and modeled channel models. Accordingly, the outage performance of wireless links is evaluated for WDC use-cases. The results show the tradeoffs in the implementa...

This paper proposes a 60 GHz hybrid scheme to deliver enhanced directional multi-gigabit (EDMG) performance. Based on the IEEE 802.11ad channelization, we propose a flexible FDMA/TDD hybrid radio interface for point-to-point wireless data centers (WDC) communications to achieve an equivalent performance to the IEEE 802.11ay's EDMG. In light of WDC...

In this work, an efficient characterization of finline structures is proposed. Based on the Galerkin's technique in the modal domain, its uses the mathematical operator formalism to determine the dispersion parameters and the characteristic impedance from the power-voltage concept. By selecting trial functions with edge effects, the obtained numeri...

In UHF RFID systems, the Transponder Protocol usually uses the standard ISO 18000-6 Type-C Class 1 Generation 2, which was originally developed to communicate with the reader. Since a typical UHF RFID system that operates in the band (860-960 MHz) could be used in a myriad of applications from simple product identification to more complex applicati...

The Internet of Things (IoT) is a very encouraging and fastest-growing area of today that brings together the benefits of wireless, sensor networks, actuators (WSAN) and the expansion of computer domains. A wide range of IoT applications have been developed and all aspects of this field have been identified, opportunities to problems and challenges...

In a multi-tag environment, the performance of a RFID system is mainly limited by collisions. Most of current anti-collision algorithms are TDMA based protocols, which fail considering the spatial distribution of tags thus, requiring relatively long time for tag identification, a critical constraint in large RFID systems that deal with a high numbe...

Tackling tag-and/or reader-collisions is a major concern in RFID systems since they can significantly degrade the proper functioning of the whole structure. From that, many algorithms have been proposed to address this issue. In this work, we faced both collision types in order to improve the system throughput and the identification time. Thus, we...

A recursive algorithm using suitable choice of trial functions is proposed for adequate analysis of uniaxial anisotropic microstrip type structures in multilayer configuration. The technique is based on the extension of the modal domain integral technique involving the Galerkin's procedure combined with the formalism of mathematical operators. Such...

In this paper, a modified FDTD algorithm is applied to analyze various anisotropic planar circuits in multilayer configuration via a new formulation of updated equations. This formulation takes into account the bianisotropic character of the substrate. For the first time, the effect of anisotropy on the cutoff frequency and bandwidth of rectangular...

In this paper, an algorithm based on the linear Support Vector Machine (SVM) tool was proposed to classify intracranial electroencephalography (iEEG) signals as ictal or interictal to perform human seizure prediction, efficiently. Various univariate linear measures were extracted, and the developed classifier performed adequately well with numerous...

In this work, the effects of GaN channel traps and temperature on the performance of AlGaN/AlN/GaN/AlGaN high electron mobility transistors (HEMTs) on Si (111) substrate, were investigated. 2D simulations carried out using the Silvaco TCAD simulator tool for different drain and gate voltages showed that acceptor-like traps in the channel have a sig...

Coupled with adequate choice of trial functions, a simple recursive approach was developed to efficiently model symmetrical/asymmetrical multilayered finline structures constituted of arbitrary isotropic and lossless dielectric layers. The proposed technique is based on an adequate extension of full-wave modal domain approach using the Galerkin's p...

Healthcare record sharing among various medical roles is a critical and challenging research problem especially in today’s everchanging global IT solutions. The emergence of blockchain as a new enabling technology brought radical changes to numerous business applications, including healthcare. Blockchain is a trusted distributed ledger that forms a...

Efficient recurrence expressions are proposed in this paper as promising tools for accurate dispersive analysis of symmetric coplanar structures on uniaxial electric/magnetic anisotropic composite substrates. By using the formalism of mathematical operators, the proposed formulation can accurately evaluate the admittance operator in the modal domai...

This paper investigates the computation of the characteristic impedance of asymmetrical isotropic unilateral finlines. Applying the full-wave integral modal technique along with the most widely-used impedance definition , allowed characterizing asymmetrical step discontinuities in enclosed finline cavities. Enhanced numerical solutions were obtaine...

This paper investigates the performances of microstrip patch antennas printed on biaxial anisotropic substrates, suitable for wireless applications in the WLAN band. The influence of anisotropy on resonance order as well as on impedance matching and directivity is evaluated. Simulated results show that the antenna characteristics can be significant...

This work presents a new method to easily and rapidly extract RF figures of merit of MOSFET transistors. Using DC and low frequency measurements, the extrinsic resistances (Rg, Rs, Rd), the intrinsic conductances (gm, gd), and the input capacitance Cgg have been extracted. The evaluation of these parameters has enabled to compute 2 RF figures of me...